Interfaces

Systems

Various

AE69H - AE69-2H - BC69XLT - BC69XLT-2

The Albrecht AE69H, AE69-2H, Uniden Bearcat UBC69XLT and UBC69XLT-2 are recent almost
identical scanners. The earphone socket can be modified to carry the raw demodulated audio next to the earphone audio.

The receiver IC is an SMD SL5018. The unfiltered baseband audio can be found on pin 9.

AE69H

The earphone socket is reused, so there's no need to drill for an additional socket.

Follow the next steps to make a discriminator output:

Remove the SMD resistor in the blue circle

Solder a 10 k, 1/8 W miniature resistor to the cleared solder pad

Connect the resistor's other lead to a piece of insulated wire

Solder the other side of the wire to pin 9 of the receiver IC

10 k miniature resistor

Connection to pin 9

Using a stereo 3.5 mm plug, the
earphone signal is available between the tip and ground. The discriminator output is available between the middle ring and ground.